Bedrock topography of north-central Iowa

IMAP 1080



The bedrock in Iowa (Hershey, 1969) is generally overlain by deposits of glacial drift and alluvium, which range in thickness from less than 1 ft to more than 400 ft, and from less than 1 ft to about 60 ft respectively. The configuration of the bedrock surface is the result of a complex system of ancient drainage courses which were developed during a long period of preglacial erosion and during shorter, but mroe intense, periods of interglacial erosion.

Study Area

Publication type Report
Publication Subtype USGS Numbered Series
Title Bedrock topography of north-central Iowa
Series title IMAP
Series number 1080
DOI 10.3133/i1080
Year Published 1978
Language English
Publisher U.S. Geological Survey
Publisher location Reston, VA
Contributing office(s) Iowa Water Science Center
Description 2 Plates: 26.72 x 35.46 inches and 30.65 x 37.98 inches
Country United States
State Iowa
County Cero Gordo, Butler, Floyd, Franklin, Mitchell, Worth
Scale 25000
Online Only (Y/N) N
Additional Online Files (Y/N) N
Google Analytic Metrics Metrics page
Additional publication details